ASTM_D_6252_-_D_6252M_-_98_2011.pdf

Designation:D6252/D6252M98(Reapproved 2011)Standard Test Method forPeel Adhesion of Pressure-Sensitive Label Stocks at a 90Angle1This standard is issued under the fixed designation D6252/D6252M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the measurement of the peeladhesion of pressure-sensitive label stocks.This test methodgives a measure of the adherence to a standard steel substrateor to other surfaces of interest for a pressure-sensitive labelstock.1.2 This test method provides a means of assessing theuniformity of the adhesion of a given type of pressure-sensitivelabel stock.The assessment may be within a sheet or roll,between sheets or rolls,or between production lots.1.3 Variations in the label stock facestock and adhesive canaffect the response;therefore,this test method cannot be usedto pinpoint the specific cause(s)of nonuniformity.1.4 This test method may not be appropriate to test labelstocks having either stiff backings or backings showing a highstretch at low forces.These characteristics could result in ahigh variability of the test response,which is not a trueindication of the real nature of the adhesive bond.1.5 The values stated in either SI or inch-pound units are tobe regarded separately as the standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem must be used independently,without combining valuesin any way.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A666 Specification for Annealed or Cold-Worked AusteniticStainless Steel Sheet,Strip,Plate,and Flat BarD996 Terminology of Packaging and Distribution Environ-mentsD3715/D3715M Practice for Quality Assurance of Pressure-Sensitive TapesD4332 Practice for Conditioning Containers,Packages,orPackaging Components for TestingE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 DefinitionsDefinitions of terms used in this testmethod are in accordance with Terminology D996.3.2 Definitions of Terms Specific to This Standard:3.2.1 pressure-sensitive label stock,nthe combination offacestock(face material),pressure-sensitive adhesive,andrelease liner.4.Summary of Test Method4.1 A strip of label stock is applied to a standard test panel,or other surface of interest,with controlled pressure.The labelstock is peeled from the panel at 90 angle at a specified rate,during which time the force required to effect peeling ismeasured.NOTE1The pressure-sensitive adhesive(psa)is permanently tackyand instantly adheres to the surface for which the label stock is designed.A psa label stock also can be defined as a self-adhering label stock.5.Significance and Use5.1 This test method is a tool for quality assurance use.Given a pressure-sensitive label stock and a requirement interms of the minimum or maximum peel adhesion valueexpected for this label stock,the data from the test can be usedin conjunction with acceptance criteria.5.2 This test method can show the relative bond strength ofa given label stock to one or more surfaces of varied materialand texture as compared to the standard stainless steel panel.Substitution of panels representative of the proposed substratesfor the standard stainless steel panel would be acceptable forthis procedure.1This test method is under the jurisdiction of ASTM Committee D10 onPackaging and is the direct responsibility of Subcommittee D10.14 on Tape andLabels.Current edition approved April 1,2011.Published April 2011.Originallyapproved in 1998.Last previous edition approved in 2004 as D6252/D6252M-98(2004).DOI:10.1520/D6252_D6252M-98R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Apparatus6.1 Specimen Cutter3The specimen cutter shall hold twosingle-edged razor blades in parallel planes,a precise distanceapart,to form a cutter of exact specimen width.NOTE2A 25.4-mm or 1-in.cutter shall consist of a 25.4-mm or 1-in.thick by 200-mm or 8-in.length of aluminum bar stock 25.4 mm or 1 in.wide.The edges for about 125 mm or 5 in.from one end shall be slightlyrounded to form a handle.The width of the bar for 75 mm or 3 in.fromthe opposite end shall be narrowed to exact